Enhancement of Be and Mg incorporation in wurtzite quaternary BeMgZnO alloys with up to 5.1 eV optical bandgap

M. Toporkov, V. Avrutin, S. Okur, N. Izyumskaya, D. Demchenko, J. Volk, David Smith, H. Morkoc¸, Özgür

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

A wide range of optical bandgap modulation up to 5.1 eV was achieved for quaternary BeMgZnO thin films prepared using plasma assisted molecular beam epitaxy, enabling development of UV emitters and solar-blind photodetectors. The significantly improved structural quality and bandgap widening in BeMgZnO layers as compared to those of BeZnO and MgZnO ternaries indicate enhanced incorporation of both Be and Mg on Zn sites in the wurtzite lattice. Correlation of lattice parameters with optical bandgaps reveals that co-alloying MgO and BeO with ZnO helps overcome the impediment of limited bandgap extension offered by the corresponding ternary compounds due to phase separation and allows lattice-matched or nearly lattice-matched BeMgZnO/ZnO heterostructures. Optimization of growth conditions at higher Mg and/or Be fluxes is expected to provide bandgaps beyond 5.1 eV.

Original languageEnglish (US)
Pages (from-to)60-64
Number of pages5
JournalJournal of Crystal Growth
Volume402
DOIs
StatePublished - 2014

Fingerprint

quaternary alloys
Optical band gaps
wurtzite
Energy gap
augmentation
Photodetectors
Alloying
Molecular beam epitaxy
Crystal lattices
Phase separation
Lattice constants
Heterojunctions
Modulation
Fluxes
Plasmas
Thin films
alloying
photometers
lattice parameters
emitters

Keywords

  • A1. Bandgap engineering
  • A3. Molecular beam epitaxy
  • B1. Quaternary BeMgZnO
  • B1. ZnO

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Materials Chemistry
  • Inorganic Chemistry

Cite this

Enhancement of Be and Mg incorporation in wurtzite quaternary BeMgZnO alloys with up to 5.1 eV optical bandgap. / Toporkov, M.; Avrutin, V.; Okur, S.; Izyumskaya, N.; Demchenko, D.; Volk, J.; Smith, David; Morkoc¸, H.; Özgür.

In: Journal of Crystal Growth, Vol. 402, 2014, p. 60-64.

Research output: Contribution to journalArticle

Toporkov, M. ; Avrutin, V. ; Okur, S. ; Izyumskaya, N. ; Demchenko, D. ; Volk, J. ; Smith, David ; Morkoc¸, H. ; Özgür. / Enhancement of Be and Mg incorporation in wurtzite quaternary BeMgZnO alloys with up to 5.1 eV optical bandgap. In: Journal of Crystal Growth. 2014 ; Vol. 402. pp. 60-64.
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AU - Okur, S.

AU - Izyumskaya, N.

AU - Demchenko, D.

AU - Volk, J.

AU - Smith, David

AU - Morkoc¸, H.

AU - Özgür,

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